Detachable union for cooling systems



July 5, 1949.

D. ANDREWS DETACHABLE UNION FOR COOLING SYSTEMS Filed July 31, 1947INVENTOR Diff/0ND fl/voezws raw Patented July 5, 1949 UNITED STATES:

E AT-E "OF F [C E The IVE- Valve Company,.Ltd., London, England, alimited company ofGroat Britain Application July 31, 1947, Serial No.765,113 In; Great Britain November 2; 1945 Section 1, Public Law 690,August 8 1946 Patent expires November 2, 1-965 5 Claims. 1

"The present invention relates to cooling means for electric dischargedevices.

In some cases, for example for cooling the fila merit leads ofthermionic discharge devices it is required to pass cooling waterthrough a passage within each lead, and for this purpose waterconnections must be made with the entry and exit ends of the passage.The connections are usually made withflexible, for example rubber,tubing pressed over nipples fixed to the filament lead head.

"In known arrangements, when it is required todet'ach the rubber tubingit is necessary to exert considerable force to remove it from thenipples and sometimes it has to be cut away. This involves risk ofinjury to the valve and is in any case inconvenient and may take anundesirably long time.

It is the object of the present invention to provide means wherebyflexible tubing may be readily attached to and detached from an electricdischarge device without causing appreciable strain in the device.

According to the present invention there is provided a detachable unionfor placing two flexible tubes in connection with a, cooling passage ina part of an electric discharge device, the said union comprising a headportion fixed or fixable to the said part and having in one faceapertures connecting respectively With the entry and exit ends of saidpassage, a detachable member having in one face apertures which registerwith those in the said head portion and which connect with nipplesprojecting from another face of said member and means for clamping thesaid detachable member to the said head portion with the correspondingapertures in said head portion and detachable member sealed to oneanother.

One embodiment of the invention as applied to a union for use in thecooling of a connecting lead of a thermionic discharge device will bedescribed by way of example with reference to the accompanying drawing.

The outer end of the filament lead II is of cylindrical shape and haswithin it two concentric water passages 9, It. The head portion l3 ofthe union has a cylindrica1 part I I screwed onto the end of thefilament lead H and locked by means of a knurled nut l5. A faced surfaceI6 is substantially parallel to the axis of the cylindrical part It andin this surface are two apertures l1 and I8, which are closed inwatertight connection with the two passages when the head portion I3 isattached to the end of the fila- 2 rn'ent leadi H. by the knurled nut15. A coupling member Ha serves to connect the filament leads H toleadswithin a thermionic discharge device.

The detachable member H! which forms the other part of the unioncomprises a body porti'on zli' having two tubes 2! and 22 fixed inapertures'therei-n and projecting on both sides thereof.

The tube projections Z-3 and 24 on one side of the member are an easyfit in the apertures l1 and 18' in the head portion and are surroundedby washers for'example of rubber. The tube proi'ec'tions zfi and 21 onthe other side constitute the" nipples and are grooved in order to givea goodrglripto rubber tubing which is pressed on to them. They may beprovided with flanges 28 which act as stops and limit the extent towhich the rubber tubing can be pressed up the nipples.

Between the two tubes is a clamping screw 29 having a knurled head. Thisscrew is free to turn but is prevented from being withdrawn from thedetachable member 19 by a grub screw 30 engaging in a groove (not shown)in the clamping screw. A threaded aperture 3| is provided in the headportion between the two apertures therein to receive the clamping screw.

The rubber tubes are normally kept attached to the detachable member,and when it is desired to remove the external water circuit from thethermionic valve, it is only necessary to unscrew the clamping screw 29and withdraw the detachable member I9.

What is claimed is:

l. A union for a cooling system comprising two separable parts havingcooperating surfaces for forming a fluid tight joint therebetween, saidunion having at least two ducts, at least two nipples on one of saidparts and extending therethrough to project from different facesthereof, the nipples projecting from one of said faces being in registrywith said at least two ducts, and means between said nipples for holdingsaid parts together with said surfaces in abutment relation, said meansbeing manually operable to selectively separate said parts and to holdthem together.

2. A union for a cooling system for an electric discharge devicecomprising 2 separable parts having oppositely disposed faces forabutment relation, each of said parts having at least 2 ducts, the ductsin one of said parts being respectively in registry with at least 2ducts in the other part, said ducts being coaxial in one portion of oneof said parts and axially displaced in the other of said parts, at least2 nipples supported on said other of said parts in registry with saidducts, and means between said nipples for detachably supporting saidoppositely disposed faces in said abutment relation.

3. A union for a fluid cooling system to be attached to a device to becooled and including an elongated member having ducts extendingcoaxially therein, one end of said elongated member having a flattenedsurface, said ducts terminating in axially displaced openings in saidflattened surface, another member having a flattened surface in registryand contact with the flattened surface on said elongated member andsupporting a plurality of nipples having ends extending from saidlast-named surface and received within said openings, the other ends ofsaid nipples extending from another surface of said member and adaptedto receive flexible tubing, a screw intermediate said nipples fordetachably securing said members together, and means for preventingseparation of said screw from said other member.

4. A cooling system for an element in which heat is generated includingmeans defining ducts in said element and a union for removablyconnecting said ducts to flexible tubing, said union comprising a faceportion of said element having openings communicating with said ducts,and a detachable member comprising a body portion, nipples supported onand extending through said body portion, one end of said nipples beingconnectable to said flexible tubing, apertures in said body portioncommunicating with said nipples, said apertures being in registry withsaid ducts in said element when said union is assembled, and means forassembling said union, said means comprising a screw engaging anadditional ap- .4 erture in said body portion and a threaded aperture insaid face portion of said element, and means for preventing separationof said screw from said body portion.

5. A detachable union for a cooling system for a device in which heat isgenerated, said system including feed and return ducts for a coolant,said union comprising a head portion connected to said device, saidducts being concentrically arranged in said head portion, said headportion having a flat surface, axially displaced ducts extending fromsaid surface to said concentrically arranged ducts, said union includinga detachable member having a flat surface, nipples extending from saidflat surface in registry with said axially displaced ducts and fittinginto said ducts, said nipples extending through said detachable memberand projecting from another surface thereof, means on said nipplesprojecting from said other surface for receiving rubber hose in a firmand relatively fixed engagement, said rubber hose being separable fromsaid systems without breaking said engagement.

DESMOND ANDREWS.

REFERENCES CITED The following referenlces are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,692,708 Serpas Nov. 20, 19281,704,487 Robertshaw Mar. 5, 1929

